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A single character could be enough to let hackers crack your Linux kernel

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  • Logic‑inversion bug in Linux kernel (CVE‑2026‑23111) enabled local privilege escalation
  • Affected major distros including Debian, Ubuntu, and RHEL; fixes rolling out unevenly
  • Discovery adds to surge of recent Linux LPEs as maintainers struggle with AI‑driven bug‑report overload

A single stray character sitting in the Linux kernel created a logic inversion bug that enabled privilege escalation, leading to a (theoretical) full device takeover.

The bug was discovered in early 2025 by security researcher Oliver Sieber from Exodus Intelligence, who later demonstrated a full working local root exploit, and is now tracked as CVE-2026-23111 and given a severity score of 7.8/10 (high).

According to TheHackerNews, the vulnerability is tied to the upstream Linux kernel, meaning it can affect many distributions that shipped a vulnerable kernel build. Specifically, Debian (Bookworm and Trixie, and in some instances Bullseye), Ubuntu (22.04 LTS, 24.04 LTS, and 25.10), and Red Hat Enterprise Linux 10 (RHEL 10)...

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